SOHC.co.uk Forums > CB500/550

Strange fault

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flc:
I took my bike for its mot today( it flew thro :))
The fault is that from cold it will start first kick, but if you dont catch it properly and rev it a bit till its warmish.
and it stalls then im in for a sweaty 50 kick marathon even bumping didnt get it to go...
any ideas????
ta flc.

matthewmosse:
Checked plugs, leads? sounds either like it's flooding or has a carb issue? plugs should give a clue what's going on.

Bryanj:
Low battery charge/bad spark

flc:
I had an hour today.
 so had a nose,
 id left battery charging overnight.
still no joy, so pulled plugs and all are dry? ive since wound out the pilot screws a full turn, and she fired up????
not sure if i stumbled on the fault or was on my 50th kick :) wil see tommorow once its had time to cool,
i did notice the left hand conecting manifold hose thing????? is split and the previous bodger/owner has used normal car jubilee clips. i have another set so looks like its carbs off time (my favorite job). thanks for your help so far folks.

matthewmosse:
Sounds like an air leak is your culprit then, dry plugs and a split manifold - cause and effect, too much air getting in, lean mixture would make starting difficult. I'd not worry overly about the jubilee clips but the split manifold will need remedying, new ones can be a problem to source but do come up used on ebay. A bodge repair using cloth and gaskett goo can be effective as a  bodge to keep things running.

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